Finding the Fourth Proportional to 2,146.94, 3,221.49 and 993.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.94 : 3,221.49 = 993.50 : x
2. Step 2: Convert to fraction form
   2,146.94/3,221.49 = 993.50/x
3. Step 3: Cross multiply
   2,146.94x = 3,221.49 × 993.50
4. Step 4: Simplify right side
   2,146.94x = 3,200,550.32
5. Step 5: Solve for x
   x = 3,200,550.32/2,146.94
6. Step 6: Final answer
   x = 1,490.75